@@ -5234,6 +5234,156 @@ static void DemoWindowLayout()
52345234
52355235 ImGui::TreePop();
52365236 }
5237+
5238+ #if IMGUI_HAS_STACK_LAYOUT
5239+ IMGUI_DEMO_MARKER("Layout/Stack Layout");
5240+ if (ImGui::TreeNode("Stack Layout"))
5241+ {
5242+ static bool widget_a = true, widget_b = true, widget_c = true;
5243+ static bool spring_a = true, spring_ab = true, spring_bc = true, spring_c = true;
5244+ static bool minimize_width = false, minimize_height = true;
5245+ static bool horizontal = true, draw_springs = true;
5246+ static ImVec2 item_spacing = ImGui::GetStyle().ItemSpacing;
5247+ static float a_c_spring_weight = 0.0f;
5248+ static float ab_spring_weight = 0.5f;
5249+ static float alignment = 0.5f;
5250+
5251+ struct funcs
5252+ {
5253+ static void VisibleSpring(float spring_weight)
5254+ {
5255+ ImGui::Spring(spring_weight);
5256+ if (!draw_springs)
5257+ return;
5258+
5259+ ImVec2 rect_min = ImGui::GetItemRectMin();
5260+ ImVec2 rect_max = ImGui::GetItemRectMax();
5261+
5262+ ImVec2 rect_size = ImGui::GetItemRectSize();
5263+ if (rect_size.x <= 0.0f && rect_size.y <= 0.0f)
5264+ return;
5265+
5266+ // Draw zig-zag
5267+ float width = 0.0f, spacing = 0.0f;
5268+ ImVec2 direction, origin;
5269+ ImVec2 spacing_min, spring_max;
5270+
5271+ if (horizontal)
5272+ {
5273+ spacing = floorf(item_spacing.x);
5274+ width = rect_size.x - spacing;
5275+ origin = ImVec2(floorf(rect_min.x), floorf(rect_min.y + (rect_max.y - rect_min.y) / 2));
5276+ direction = ImVec2(1.0f, 0.0f);
5277+ spring_max = ImVec2(rect_min.x + width, rect_max.y);
5278+ spacing_min = ImVec2(rect_min.x + width, rect_min.y);
5279+ }
5280+ else
5281+ {
5282+ spacing = floorf(item_spacing.y);
5283+ width = rect_size.y - spacing;
5284+ origin = ImVec2(floorf(rect_min.x + (rect_max.x - rect_min.x) / 2), floorf(rect_min.y));
5285+ direction = ImVec2(0.0f, 1.0f);
5286+ spring_max = ImVec2(rect_max.x, rect_min.y + width);
5287+ spacing_min = ImVec2(rect_min.x, rect_min.y + width);
5288+ }
5289+
5290+ if (spring_weight <= 0.0f && spacing <= 0.0f)
5291+ return;
5292+
5293+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5294+
5295+ draw_list->PushClipRect(rect_min, rect_max, true);
5296+
5297+ draw_list->AddRectFilled(rect_min, spring_max, ImColor(80, 20, 80));
5298+ draw_list->AddRectFilled(spacing_min, rect_max, ImColor(80, 20, 20));
5299+
5300+ const float zig_zag_size = 3;
5301+ ImVec2 normal = ImVec2(-direction.y, direction.x);
5302+
5303+ draw_list->PathClear();
5304+ origin.x += 0.5f;
5305+ origin.y += 0.5f;
5306+ draw_list->PathLineTo(origin);
5307+ for (float x = zig_zag_size * 0.5f; x <= width; x += zig_zag_size)
5308+ {
5309+ ImVec2 p;
5310+ p.x = origin.x + direction.x * x + normal.x * zig_zag_size;
5311+ p.y = origin.y + direction.y * x + normal.y * zig_zag_size;
5312+ draw_list->PathLineTo(p);
5313+ normal = ImVec2(-normal.x, -normal.y);
5314+ }
5315+ draw_list->PathStroke(ImColor(255, 255, 255, 190), false, 1.0f);
5316+
5317+ draw_list->PopClipRect();
5318+ }
5319+ };
5320+
5321+ ImGui::Checkbox("Widget A", &widget_a); ImGui::SameLine();
5322+ ImGui::Checkbox("Widget B", &widget_b); ImGui::SameLine();
5323+ ImGui::Checkbox("Widget C", &widget_c);
5324+ ImGui::Checkbox("Spring A", &spring_a); ImGui::SameLine();
5325+ ImGui::Checkbox("Spring AB", &spring_ab); ImGui::SameLine();
5326+ ImGui::Checkbox("Spring BC", &spring_bc); ImGui::SameLine();
5327+ ImGui::Checkbox("Spring C", &spring_c);
5328+ ImGui::Checkbox("Horizontal", &horizontal); ImGui::SameLine();
5329+ ImGui::Checkbox("Minimize Width", &minimize_width); ImGui::SameLine();
5330+ ImGui::Checkbox("Minimize Height", &minimize_height);
5331+ ImGui::Checkbox("Draw Springs", &draw_springs); ImGui::SameLine();
5332+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5333+ ImGui::ColorButton("- Spring", ImColor(80, 20, 80), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5334+ ImGui::TextUnformatted("Spring"); ImGui::SameLine();
5335+ ImGui::TextUnformatted(" "); ImGui::SameLine();
5336+ ImGui::ColorButton("- Spacing", ImColor(80, 20, 20), ImGuiColorEditFlags_NoTooltip | ImGuiColorEditFlags_NoPicker); ImGui::SameLine();
5337+ ImGui::TextUnformatted("Item Spacing");
5338+ ImGui::DragFloat("Item Spacing", horizontal ? &item_spacing.x : &item_spacing.y, 0.1f, 0.0f, 50.0f);
5339+ ImGui::DragFloat("A & C Spring Weight", &a_c_spring_weight, 0.002f, 0.0f, 1.0f);
5340+ ImGui::DragFloat("AB Spring Weight", &ab_spring_weight, 0.002f, 0.0f, 1.0f);
5341+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("BC Spring Weight = 1 - AB Spring Weight");
5342+ ImGui::DragFloat("Minor Axis Alignment", &alignment, 0.002f, 0.0f, 1.0f);
5343+ if (ImGui::IsItemHovered()) ImGui::SetTooltip("This is vertical alignment for horizontal layouts and horizontal alignment for vertical layouts.");
5344+ ImGui::Text("Layout widgets:");
5345+ ImGui::Text("| Spring A | Widget A | Spring AB | Widget B | Spring BC | Widget C | Spring C |");
5346+
5347+ ImGui::Spacing();
5348+
5349+ ImVec2 widget_size;
5350+ widget_size.x = floorf(ImGui::GetContentRegionAvail().x / 4);
5351+ widget_size.y = horizontal ? floorf(widget_size.x / 3) : widget_size.x;
5352+
5353+ ImVec2 small_widget_size = widget_size;
5354+ if (horizontal)
5355+ small_widget_size.y = floorf(small_widget_size.y / 2);
5356+ else
5357+ small_widget_size.x = floorf(small_widget_size.x / 2);
5358+
5359+ ImVec2 layout_size = ImVec2(widget_size.x * 4, widget_size.y * 4);
5360+ if (minimize_width) layout_size.x = 0.0f;
5361+ if (minimize_height) layout_size.y = 0.0f;
5362+
5363+ // Minor axis alignment can be set by style or directly in BeginHorizontal/BeginVertical
5364+ // Example:
5365+ // ImGui::PushStyleVar(ImGuiStyleVar_LayoutAlign, alignment);
5366+
5367+ ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(floorf(item_spacing.x), floorf(item_spacing.y)));
5368+
5369+ if (horizontal) { ImGui::BeginHorizontal("h1", layout_size, alignment); } else { ImGui::BeginVertical("v1", layout_size, alignment); }
5370+ if (spring_a) { funcs::VisibleSpring(a_c_spring_weight); }
5371+ if (widget_a) { ImGui::Button("Widget A", widget_size); }
5372+ if (spring_ab) { funcs::VisibleSpring(ab_spring_weight); }
5373+ if (widget_b) { ImGui::Button("Widget B", small_widget_size); }
5374+ if (spring_bc) { funcs::VisibleSpring(1.0f - ab_spring_weight); }
5375+ if (widget_c) { ImGui::Button("Widget C", widget_size); }
5376+ if (spring_c) { funcs::VisibleSpring(a_c_spring_weight); }
5377+ if (horizontal) { ImGui::EndHorizontal(); } else { ImGui::EndVertical(); }
5378+
5379+ ImGui::PopStyleVar();
5380+
5381+ ImDrawList* draw_list = ImGui::GetWindowDrawList();
5382+ draw_list->AddRect(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), ImGui::GetColorU32(ImGuiCol_Border));
5383+
5384+ ImGui::TreePop();
5385+ }
5386+ #endif // IMGUI_HAS_STACK_LAYOUT
52375387}
52385388
52395389//-----------------------------------------------------------------------------
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